Gate valve



March 114, 1933. D. J. MORAN GATE VALVE Filed Aug. 15, 1931 \3 /7 I! 1} i E 1 i /0 i j 5 42 LQQHQES INVENTOR. 50/7/25/ Mora/7 Patented Mar. 14, 1933 UNITED STATES PATENT OFFICE DANIEL J. MORAN, OF PONCA CITY, OKLAHOMA, ABS'IGNOR TO CONTINENTAL OIL COMPANY, OF PONCA CITY, OKLAHOMA, A CORPORATION OF DELAWARE GATE VALVE Application fled August 1q,'1931. Serial No. 557,229.,

My invention relates to gate valves and more particularly to valves for use in the ..d drilling of high pressure oil and gas wells.

One of the greater problems oil and gas well drillers have'to contend with in. the drilling of such wells is the erosion, wearing outand cutting away of the master gate valves b sand, stone and shale, carried out by the 011 or gas o both, usually at exceed- 1:) in 1y high velocities.

t is necessary to use an oversize valve trol of a well and causes, in many cases, much 5 propertyv dama e and frequently fatalities. One of the o jects of my invention is to eliminate the above disadvantages. Another object of my invention is to provide abrasion resisting inserts which will take the wear. a

A further object of my invention is to prevent the fluid stream from touching the valve and the valve seat.

Other objects will appear from the followin description:

e drawing represents a section of an assembly embodying my invention.

In general, my invention contemplates the contraction of a well stream by means of a vena contracta and a Venturi section to shunt the stream by the valve seat, the valve, and an enlarged portion of the valve in order to prevent the stream from touching these parts.

More particularly referring now to the drawing, the gate valve 1 is of a standard design. The well casing terminates at 2. Connected to the upper end of the well casing 2 by union 3 is a iverging portion 4 joined by union 5 to converging member 6. It will be seen that members 4', 5 and fi form a iverging, converging nozzle. For example,

if the casing be seven inches in diameter,

a nine inch valve will be used. Member 4 Q will be swaged from seven to nine inches and joined by nine inch union 5 to member 6 which will be formed so that its internal diameter willform an opening seven inches. in diameter atits upper end. The fitting 7 connected to the outlet of the valve will have a seven inch internal diameter, flared to a bell mouth 8, above the valve.

It is to be understood that these dime I sions are merely for the purpose .of illustration' and my invention may be used with all sizes of casings and valve arrangements. While I have shown a diverging, converging Venturi flow nipple made of three parts for ease of assembly, it will be appreciated that my nozzle may be made of one or in two parts connected by a flange or in any other suitable manner, without departing from the spirit of my invention.

Linings or hard facings 9- and 10 are fitted internally in members 7 and 6. This facing I may be made of stoodite or stellite or of any other suitable hard, abrasion resisting material. 1 I

Gate valve member 11 has upper 'seat 12 and lower seat 13. It is to be noted that this seat falls without the projected area of nozzle opening. Pipe 14 is connected to the member 7 in any suitable manner and leads to the manifold for directing the well flow as desired.

It will be obvious from the above description that the well stream will be converted into a jet by the nozzle 6. When the valve is open to its fullest extent, the jet thus formed will be directed into the member 7 through the bell mouth 8 without touching the valve seat or the valve thus precluding erosion and wear. It will be obvious that there will be no danger- 0f solid particles sticking in the seat and thus preventing the valve from closing. All the wear is taken by the abrasion resistant inserts. My flow nipples may be fitted to a valve of a standard design, thus converting it into an erosion resisting valve expeditiously and with small cost.

It will be understood that certain features and sub-combinations are of utility and may be employed alone. It is further obvious that various changes may be made in the details within the scope of the appended. claims without departing from the spirit of my invention. Therefore, it is to be understood, that my invention is not to be limited to the specific details shown and described.

Having thus described my invention, what I claim is 1. In an oil well valve assembly, a con-- ventional gate valve having a valve seat and inlet and outlet ports, a member to protect the seat from the abrasive action of the solid particles in the oil comprising, an abrasion resisting fitting removably positioned in the inlet port through which the efiluent oil is adapted to flow, said fitting having an internal cross-section of progressively decreasing diameter and terminating in an orifice having a smaller diameter than the valve seat, said fitting adapted to convert the efiluent oil stream into a jet for projection thereof past the valve seat without contacting the same.

2. In an oil well valve assembly, a conventional gate valve havinginletand outlet ports, a valve seat surrounding each port, a member to protect the seat from the abrasive action of the solid particles in the oil comprising, an abrasion resisting fitting removably positioned in the inletport through whlch the efiluent oil is adapted to flow, said fitting having an internal cross-section of progressively decreasing. diameter and terminating in an orifice having a smaller diameter than one of the valve seats, said fitting adapted to convert the eflluent oil stream into a jet for projection thereof past the last mentioned valve seat without contacting the same and an abrasion resisting fitting secured in said outlet port having a progressively decreasing internal diameter for a portion of its length, the largest internal cross-sectional area being immediately adjacent the other valve seat.

3. In an oil well valve assembly, a conventional gate valve having a valve seat and inlet and outlet ports, a member to rotect the seat from the abrasive action 0 the solid let ports, a valve seat surrounding each port, a member to protect the seat from the abrasive action of the solid comprising, a fitting adapted to be secured in the inlet port through which the efiiuent oil is adapted to flow, said fitting having an internal cross-section of progressively decreasing diameter and terminating in an orifice having a smaller diameter than one of the valv seats, said fittin adapted to convert the efiluent oil stream into a jet for projection thereof past the last mentioned valve seat without contacting the same and a fitting secured in said outlet port having aprogressively decreasing internal diameter for a portion of its length, the largest internal crosssec-tional area being immediately adjacent the other valve seat,,said fittings being pro vided with abrasion resisting linings.

In testimony whereof I aflix m signature.

DANIEL J. ORAN.

particles in the oil comprising, a fitting removably positioned in the inlet port through which the efiluent oil is adapted to flow, said fitting having an internal cross-section of progressively decreasing diameter and terminating in an orifice having a smaller di ameter t an the valve seat, said fitting adapted to convert the efiluent oil stream into a jet for projection thereof past the valve seat without contacting the same, and an abrasion resisting lining for said fitting.

4. In an oil well valve assembly, a conventional gate valve having inlet and outparticles in the oil 

